| Main Title |
Evaluation of 1 percent neutral buffered potassium iodide procedure for calibration of ozone monitors / |
| Author |
Beard, Michael E.
|
| Other Authors |
|
| CORP Author |
Environmental Monitoring and Support Lab., Research Triangle Park, N.C. |
| Publisher |
U.S. Environmental Protection Agency, |
| Year Published |
1977 |
| Report Number |
EPA-600/ 4-77-005 |
| Stock Number |
PB-267 985 |
| OCLC Number |
09181197 |
| Subjects |
Atmospheric ozone--Measurement--Calibration
|
| Additional Subjects |
Gas detectors ;
Calibrating ;
Ozone ;
Potassium iodide ;
Gas analysis ;
Chemical analysis ;
Performance evaluation ;
Air pollution ;
Monitors ;
Oxidizers ;
Error analysis ;
Experimental design ;
Design criteria ;
Procedures ;
Air pollution detection
|
| Internet Access |
|
| Holdings |
| Library |
Call Number |
Additional Info |
Location |
Last
Modified |
Checkout
Status |
| EJBD |
EPA 600-4-77-005 |
|
Headquarters Library/Washington,DC |
12/02/2015 |
| EKBD |
EPA-600/4-77-005 |
|
Research Triangle Park Library/RTP, NC |
10/07/2005 |
| ELBD ARCHIVE |
EPA 600-4-77-005 |
Received from HQ |
AWBERC Library/Cincinnati,OH |
10/04/2023 |
| ESAD |
EPA 600-4-77-005 |
|
Region 10 Library/Seattle,WA |
03/23/2010 |
| NTIS |
PB-267 985 |
Some EPA libraries have a fiche copy filed under the call number shown. |
|
07/26/2022 |
|
| Collation |
v, 45 pages : illustrations, charts, tables ; 28 cm. |
| Abstract |
The 1 percent neutral buffered potassium iodide procedure, as specified for calibration of ozone monitors in the Environmental Protection Agency (EPA) reference method for measurement of photochemical oxidants, was evaluated. The procedure was found to be vulnerable to error in three major areas: (1) the time allowed for measurement of iodine absorbance, (2) purity of potassium iodide reagent, and (3) type of impinger used. Variations in results produced by minor changes within the specifications of the procedure suggest that the method is difficult to control. Improved specifications and procedures were documented to minimize the effect of these parameters on results and to aid the user in proper use of the procedure. The improved procedure shows a positive bias of 7.5 + or - 3.4 percent. The Environmental Monitoring and Support Laboratory (EMSL), EPA, has decided that further work to improve the procedure is not warranted and has initiated work on a program to evaluate candidate procedures to replace the neutral buffered potassium iodide procedure. |
| Notes |
Includes bibliographical references (pages 26-27). |
| Contents Notes |
The 1 percent neutral buffered potassium iodide procedure, as specified for calibration of ozone monitors in the Environmental Protection Agency (EPA) reference method for measurement of photochemical oxidants, was evaluated. The procedure was found to be vulnerable to error in three major ares: 1) the time allowed for measurement of iodine absorbance, 2) purity of potassium iodide reagent, and 3) type of impinger used. Variations in results produced by minor changes within the specifications of the procedure suggest that the method is difficult to control. Improved specifications and procedures were documented to minimize the effect of these parameters on results and to aid the user in proper use of the procedure. the improved procedure shows a positive bias of 7.5 « 3.4 percent. The Environmental Monitoring and Support Laboratory (EMSL), EPA, has decided that further work to improve the procedure is not warranted and has initiated work on a program to evaluate candidate procedures to replace the neutral buffered potassium iodide procedure. |
| Place Published |
Washington, DC |
| Access Notes |
Also available via the World Wide Web |
| Corporate Au Added Ent |
Environmental Monitoring Systems Laboratory (Research Triangle Park, N.C.) |
| Title Ser Add Ent |
Research reporting series. Environmental monitoring ; EPA-600/4-77-005. |
| PUB Date Free Form |
1977 |
| Series Title Untraced |
Environmental Monitoring series ; EPA-600/4-77-005 |
| NTIS Prices |
PC A03/MF A01 |
| BIB Level |
m |
| Medium |
unmediated |
| Content |
text |
| Carrier |
volume |
| Cataloging Source |
RDA |
| OCLC Time Stamp |
20140428102956 |
| Language |
eng |
| Origin |
OCLC |
| Type |
MERGE |
| OCLC Rec Leader |
02466cam 2200349Ii 45020 |
